I've got a new player joining my game, and he's running a Duck. He ended up with a STR of 10, and a SIZ of 6, which should have given a 0 for damage bonus. Instead, it came up with -1d4. Playing around with it, the sum of STR and SIZ had to be 18 or higher to avoid the -1d4 damage bonus. Rules state that you get a -1d4 damage bonus for sum of 12 or less. BTW, really like the sheet overall, especially how when you make an attack roll, it automatically rolls damage and location. Thanks for the work that has been done on this.